I'm building out a homelab and got permission from my Electrician to install a bunch of ENT "smurf tubes" everywhere for low voltage applications. Some lines running to the front of the house for possible future Fiber to the Door, and some running to low voltage wall plates for cameras or Access Points. I memorized Article 362 of the NEC and much of the other relevant chapters just to be sure I was doing it right.
I followed section 362.20 to a T, and secured it every 3 feet.
While I was out today the electrician came by and told a family member that some of installations where in violation of code. Something about how I didn't secure my conduit enough, it can't be attached to the sheathing, and has to be secured within 1 foot a junction box. Annoyingly no one wrote down what he said, no one can remember what he actually said, he isn't answering is phone and neither is his company. I tried calling the electrical inspectors office to ask them some questions but they aren't picking up either.
It's practically the weekend, so I'd like to get this fixed and learn what my code violations are if any.
The other low voltage wires are secured independently. The hole will be filled with fire blocking. Does the conduit need to be secured closer to the hole in the top plate?
Ignore the Coax cables, they are just temporarily placed for now. Does this conduit need to be secured closer to the Structured Media Center?
Can this conduit be secured to the cross-member of the rafter?
Can conduit be secured to the sheathing of an exterior wall?
I'm most interested in learning the NEC, If you could could quote me the section number of any violations I have I would be most interested. If I'm just violating a best practice and not necessarily the NEC, let me know.
Best Answer
The NEC doesn't require support within a foot of termination, but there may be some state or local amendment that may modify 362.30.
As far as attaching to sheathing I can't think of wording in the code that directly addresses that specifically, but an inspector would likely claim that the sheeting is not structurally sound for support, which would create a building code violation or not installed per UL.
Section 300.4 needs to be addressed, a couple holes and supports look like they might be closer than 1.25" to the edge of a wood penetration, you would need nail plates.